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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 15 Abstracts search results
Document:
SP275-48
Date:
March 1, 2011
Author(s):
Vicki L. Brown, Lawrence C. Bank, Dushyant Arora, David T. Borowicz, Ahmed Godat, Anthony J. Lamanna, Jaeha Lee, Fabio Matta, Annalisa Napoli, and Kiang Hwee Tan
Publication:
Symposium Papers
Volume:
275
Abstract:
A method for strengthening reinforced concrete members using mechanically-fastened FRP (MF-FRP) has been studied in laboratory investigations and in several bridge strengthening demonstration projects. The strengthening is obtained by attaching FRP strips, with high bearing and longitudinal strengths, to concrete elements using steel power actuated fastening “pins” (PAFs), steel anchor bolts or concrete screws, or a combination thereof. The MF-FRP method requires minimal surface preparation and permits immediate use of the strengthened structure. Published research on this method with a range of member sizes has shown promising results in terms of installation efficiency, level of strengthening achieved, and preventing strip delamination before concrete crushing. This State-of-the-Art paper presents an overview of work conducted over the last 10 years on experimental aspects of the MF-FRP method, with beams as well as one-way and two-way slabs. A database of collected test results for MF-FRP strengthened beams and one-way slabs is presented.
DOI:
10.14359/51682458
CI2110Khalifa
October 1, 1999
A. Khalifa; T. Alkhrdaji; A. Nanni; and S. Lansburg
Concrete International
21
Issue:
10
This article presents a novel anchor system called U-anchor that can be used to significantly improve the performance of surface mounted reinforcement for concrete/masonry made of fiber reinforced polymer (FRP) composites. In applications where bond and/or development length of FRP are critical, the U-anchor prevents debonding of the reinforcement. The anchor is based on the idea of embedding a bent portion of the end (or near the end) of the FRP reinforcement into a preformed groove in the concrete/masonry. The groove is filled with a viscous paste and may or may not include an FRP bar. The U-anchor is compatible with any external FRP strengthening system and my avoid high stress concentration and durability concerns comparing to traditional mechanical anchors made of steel plates and bolts. It can be used with sheets and pre-cured laminates that are unbonded or fully bonded to concrete. Laboratory testing confirms the excellent performance of the U-anchor system.
SP163-10
August 1, 1996
U. Maeder
163
The objective of this paper is to present a new class of corrosion inhibitors. These organic and mixed (organic/inorganic) inhibitors are used as concrete admixtures or in repair products to delay the onset of corrosion or to reduce the rate of corrosion of steel in concrete structures. The inhibiting properties are documented in solution and in concrete. The interaction mechanism of the inhibitors with a steel surface has been studied using sophisticated surface analytical methods. The transport properties of these inhibitors are shown in mortar and concrete blocks. The inhibitors delay the onset of corrosion and reduce the rate of corrosion. They can be used as a concrete admixture, surface applied on existing structures, in repair mortars, or in grouts for rock bolts and anchors.
10.14359/1360
CI1102Siddiqui
February 1, 1989
Faruq M. A. Siddiqui and Jan W. Beseler
11
2
Article assists the designer in computing the concrete pullout strength for anchor bolt configurations. Nondimensionalized area coefficients are plotted for four patterns: 4-bolt, 6-bolt, and two 8-bolt patterns. The variables used are the center-to-center spacing of the bolts, the depth of embedment, and the diameter of the mechanical anchor heads. It is assumed that, in a particular pattern, all the anchor bolts are of the same type and have the same embedment length.
SP103
September 1, 1987
Editor: Gerard B. Hasselwander
103
SP103 Designers and contractors will find the knowledge contained in Anchorage to Concrete invaluable for choosing the proper anchors for specific applications. A compilation of 15 symposium papers, this ACI publication will explore the various problems, and give insight into the latest solutions in this often neglected aspect of concrete construction. Presenting the various anchorage system alternatives, this state-of-the-art publication includes such topics as: anchor bolts in reinforced concrete foundations, dowels for anchoring new concrete facing to existing lock walls, strength and behavior of single cast-in-place anchor bolts subject to tension, headed studs, theoretical considerations on loadbearing behavior of expansion anchors, and transverse load capacity of multi-dowel anchorages in concrete.
10.14359/14137
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